Bingo!

At least you have located the problem for me.

Now I'm just wondering why it loads flawless in rhuk_milkyway or ja_purity, but not in my template.
When looking at the <head> section of my template and the default templates (mentioned above) there is no big difference.
So I'm a bit unsure of where to look for a reason...
Other add-ons (such as Multithumb) loads fine in the <head>-section.
What determinates what should be included in the head-section? Looking in my files in the template folder I really don't see any significant difference.
Any explanation or guidance would highly appreciated.
Cheers
Peter